TRIstat SDHA, NF is a Paraben and Formaldehyde Free preservative that will fight against Yeast, Molds, as well as Gram Positive and Gram Negative Bacteria. TRIstat SDHA, NF can be used in leave-on and rinse-off applications and is permitted in natural and organic cosmetics (ECOCERT/COSMOS, Soil Association, ICEA/AIAB, NaTrue).